Vapor fuel system unit



FIG. 1 is a perspective view of a vapor fuel system unit showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view thereof.

The tubing in FIGS. 1-7 is shown broken away to indicate indeterminate length. 

The ornamental design for a vapor fuel system unit, as shown and described. 